Let’s define it:
Competence
noun
1. the quality of being competent; adequacy; possession of required skill, knowledge, qualification, or capacity: He hired her because of her competence as an accountant.
2. sufficiency; a sufficient quantity.
3. an income sufficient to furnish the necessities and modest comforts of life.
4. Law . (of a witness, a party to a contract, etc.) legal capacity or qualification based on the meeting of certain minimum requirements of age, soundness of mind, citizenship,or the like.
5. Embryology . the sum total of possible developmental responses of any group of blastemic cells under varied external conditions.
http://dictionary.reference.com/browse/competence
In entries here and there, I intend to address the question of competence in myself and others. We have defined it just now, but competence is more than its definition.